From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752764AbdLKTCw (ORCPT ); Mon, 11 Dec 2017 14:02:52 -0500 Received: from mga18.intel.com ([134.134.136.126]:15444 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751347AbdLKTCu (ORCPT ); Mon, 11 Dec 2017 14:02:50 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,392,1508828400"; d="scan'208";a="12526508" From: abhijeet.kumar@intel.com To: Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , John Hsu , Abhijeet Kumar , Bhumika Goyal , alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Subject: [PATCH] ASoC: nau8825: fix issue that pop noise when start capture Date: Tue, 12 Dec 2017 00:40:25 +0530 Message-Id: <1513019426-9623-1-git-send-email-abhijeet.kumar@intel.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Abhijeet Kumar In skylake platform, we hear a loud pop noise(0 dB) at start of audio capture power up sequence. This patch removes the pop noise from the recording by adding a delay before enabling ADC. Signed-off-by: Abhijeet Kumar --- sound/soc/codecs/nau8825.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c index 714ce17da717..e853a6dfd33b 100644 --- a/sound/soc/codecs/nau8825.c +++ b/sound/soc/codecs/nau8825.c @@ -905,6 +905,7 @@ static int nau8825_adc_event(struct snd_soc_dapm_widget *w, switch (event) { case SND_SOC_DAPM_POST_PMU: + msleep(125); regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL, NAU8825_ENABLE_ADC, NAU8825_ENABLE_ADC); break; -- 1.9.1